EP 0604151 A1 19940629 - Process for preparing novel high solids non-aqueous polymer compositions.
Title (en)
Process for preparing novel high solids non-aqueous polymer compositions.
Title (de)
Verfahren zur Herstellung von neuen nicht-wässerigen Polymerzusammensetzungen mit hohem Feststoffgehalt.
Title (fr)
Procédé de préparation de nouvelles compositions polymères non aqueuses à forte teneur en matières solides.
Publication
Application
Priority
US 99399092 A 19921221
Abstract (en)
The use of falling-film evaporation and a concentration means such as centrifugal separation to dehydrate and concentrate a water-in-oil polymer emulsion or suspension is disclosed. In a preferred embodiment, a water-in-oil polymer composition containing less than about 25% active polymer solids is dehydrated in falling-film evaporator to produce an evaporator concentrate containing less than about 5.0% water. The evaporator concentrate then flows to a separation device such as a centrifuge, wherein oil is removed to produce a composition that is substantially a polymer and emulsifying surfactant-in-oil composition containing in excess of about 60 weight % polymer solids. The centrifuge raffinate may optionally be treated in a second separation means to capture additional polymer solids, with optional recycle of the oil-rich raffinate. The concentrated polymer composition is preferably stabilized with a steric stabilizer to produce a free flowing liquid product.
IPC 1-7
IPC 8 full level
C08J 3/00 (2006.01); B01D 1/22 (2006.01); C08F 6/00 (2006.01); C08J 3/09 (2006.01)
CPC (source: EP KR US)
B01D 1/22 (2013.01 - EP KR US); C08F 6/008 (2013.01 - EP KR US); C08J 3/09 (2013.01 - EP KR US)
Citation (search report)
- [X] DE 2926103 A1 19810108 - BAYER AG
- [A] DD 301096 A7 19921008 - SKL MOTOREN SYSTEMTECH
- [X] CHEMICAL ABSTRACTS, vol. 115, no. 26, 30 December 1991, Columbus, Ohio, US; abstract no. 282264f, NAGASE K. ET AL: "Dewatering of Lacquer with Application of Shear" & JP H03205469 A 19910906 - NIPPON PETROCHEMICALS CO LTD, et al
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0604151 A1 19940629; AU 5252293 A 19940630; AU 672251 B2 19960926; BR 9305178 A 19940628; CA 2111297 A1 19940622; CN 1089953 A 19940727; FI 935640 A0 19931215; FI 935640 A 19940622; HU 9303674 D0 19940428; HU T77549 A 19980528; JP H06220207 A 19940809; KR 940014445 A 19940718; MX 9400011 A 19940630; NZ 250461 A 19951127; PL 301594 A1 19940627; US 5589525 A 19961231; ZA 939519 B 19940808
DOCDB simple family (application)
EP 93310288 A 19931220; AU 5252293 A 19931220; BR 9305178 A 19931221; CA 2111297 A 19931213; CN 93120118 A 19931220; FI 935640 A 19931215; HU 9303674 A 19931220; JP 32239093 A 19931221; KR 930028577 A 19931220; MX 9400011 A 19940103; NZ 25046193 A 19931215; PL 30159493 A 19931221; US 31537194 A 19940930; ZA 939519 A 19931220